Twin multiple loop television antenna



Feb. 24, 1959 J. A. MCGRANE Q 2,875,441

TWIN MULTIPLE LOOP TELEVISION ANTENNA Filed Oct. 14, 1954 I N V EN TOR.@7155 j: fl y Z542 C /Mi United States Patent 'Ofiice ,1

1 2,875,441 TWIN MULTIPLE L001 TELEVISION ANTENNA James A.Mc Grane,ssining, N. Y.

7 Application 0etoben14, 1954, Serial No. 462,250

3 Claims. (Cl. 343-806 This invention relates to television antennas.

It is an object of the present invention to provide a twin multiple loopantenna for television sets which will, in most instances, eliminate theneed for a roof antenna within a radius of fifty miles from atransmitting station.

It is still another object of the present invention to provide a twinmultiple loop antenna of the above type which may also be used as a roofantenna when increased in size.

Other objects of the present invention are to provide a televisionantenna bearing the above objects in mind 25 which is light in weight,of simple construction, inexpensive to manufacture, has a minimum numberof parts, may be used in any place desired, is efficient in use andoperation.

For other objects and a better understanding of the invention, referencemay be had to the following detailed description taken in connectionwith the accompanying drawing, in which:

Figure 1 is a perspective view of a preferred embodiment of theinvention shown in operative use with a television set;

Fig. 2 is a front elevational view of the invention shown alone, shownpartly in section before orientation of the loops;

Fig. 3 is a vertical sectional View taken along the line 3-3 of Fig. 1after orientation of the loops; and

Fig. 4 is an exploded perspective view of the two contact mountingplates forming a part of the invention.

Referring now more in detail to the drawing, 10 represents a televisionset having the usual screen 11, substantially as illustrated.

In the practice of my invention, a twin multiple loop antenna isprovided and includes a television mast 12 extending upwardly from amounting stand 13 of any suitable construction. 0

A rectangular mounting plate 14 having a central opening 15 (Fig. 4) issecured to the upper end of the mast 12 by means of a screw 16, the mast12 being formed of wood. A lock washer and a plain washer, not shown,may be provided intermediate the mast 12 and the plate 14, to permit therotational movement thereon of the plate while at the same time fixedlyretaining its adjustment until moved manually.

The plate 14 is provided with a pair of oppositely disposed elongatedslots 17 for adjustably securing the upper ends of the wings or loops 18of aluminum tubing by means of bolts 19 and wing nuts 20, the bolts 19passing downwardly through the slots 17 and suitable openings providedin the flattened ends of the wings 18 and receiving upwardly thereon thewing nuts (Fig. 2).. 65

A lower rectangular mounting plate 21 of Bakelite or other electricallynon-conductive material is provided with a central opening 22 whichslidably receives therethrough the mast 12. The plate 21 is providedwith the oppositely disposed elongated slots 23 to which the lower endsof the wings or loops 18 are secured by means of the bolts 24 and wingnuts 25, the wing nuts 25 now being Patented Feb. 24, 1959,

disposed uppermost. Conductors 26 are connected to each of the bolts25and extend to the terminals of the television set 10, being providedwith an insulated covering 27 (Fig.1).

Afterthe loops, plates and mast are assembled as. shown in Fig. 2, theindividual loops maybe adjusted to the orientation of Fig. 3 until thebest reception is attained, using the trial and error method. After theproper orientation is achieved, a plastic envelope 28 having an openbottom may be lowered downwardly onto the antenna so as to conceal thesame, the envelope 28 being provided with an attractive design 29 forornamental purposes.

The antenna, if desired, may be mounted directly on the back of thetelevision set, as will be obvious.

The reception may be improved by widening or narrowing the overalllength of the loops 18. Or, the wing nuts at the top and bottom may beloosened to permit the longitudinal adjustment of the ends of the loops18 within the elongated slots. The reception may also be varied byloosening the wing nuts and bending the Wings 18 backwardly and thentightening the nuts again. The entire assembly may be rotated about themast 12 for further adjustment.

The antenna is light, its installation very simple and the upkeepthereof extremely low, except perhaps for a change of cover whendesired. The antenna has the further advantage in that the owner of theset cannot be charged a rental for a master antenna ordinarily locatedon the roof of the apartment house or the like. The antenna, if desired,can be hung on the wall or hung in a closet or an attic. Furthermorealthough in the drawing the loops have been shown as having roundedends, it will be readily apparent that rectangular formations may beemployed. Also, the loops 18 themselves may be formed of a solid bar ofmaterial.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within the spirit and scope ofthe present invention as defined by the appended claims.

Having thus set forth and disclosed the nature invention, What isclaimed is:

l. A television antenna comprising a mast, a pair of wings of elongatedmaterial each formed with a plurality of vertically spaced andsubstantially horizontally extending U-shaped loops lying in a singleplane and having their central portions staggered alternately withrespect to each other, each of said wings being disposed on oppositesides of said mast, and defining a single plane therewith, means formounting the upper ends of said wings upon said mast for rotation abouta vertical axis, and electrically connecting the same, insulator meansfor rotatably mounting the lower ends of said Wings to said mast forrotation about said vertical axis, and including means for connectingthe antenna to the television set, said means for securing the upperends of said wings to said rod comprising a flat plate of electricallyconductive material having a central opening therethrough, screw meanspassing through said opening and engaging the upper end of said mast,said plate having oppositely disposed elongated slots, the upper ends ofsaid wings having openings adapted to be aligned with said slots,

of my bolts passing downwardly through said slots and the.

openings in said wings therebelow and wing nuts on the 'lower ends ofsaid bolts.

2. A television antenna according to claim 1, including washer and lockwasher means on said screw intermediate said plate in the upper end ofsaid mast whereby to permit said plate adjusted position.

3. A television antenna according to claim 2, said means for mountingthe lower ends of said wings and for to be rotated and to retain itsconnecting the same to the television set comprising a flat plate ofelectrically insulated material having a central opening rotatablyreceiving said mast therethrough, said plate having oppositely disposedelongated sl'ots, the lower ends of said wings having openingstherethrough adapted to be aligned with said slots on the undersurfacethereof, bolts passing upwardly through said openings and slots and wingnuts on the upper end of said bolts, said bolts being connected to theantenna terminals of the television set, by conductors.

References Cited in the file of this patent UNITED STATES PATENTS CarnesApr. 9, 1861 Athearn Apr. 13, 1909 Harms June 30, 1931 Green June 30,1936 Leib July 7, 1936 Fulop Ian. 11, 1955 Middlemark Feb. 5, 1957FOREIGN PATENTS Germany ...Dec. 20,1951 Switzerland May 16, 1947

